#1B4B7B#1B4B7B

#1B4B7B is a dark, moderate cyan. Relative luminance 0.067; OKLCH L 40.6% C 0.096 H 251.4°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B7B
RGB	rgb(27, 75, 123)
HSL	hsl(210, 64%, 29%)
HSV	hsv(210, 78%, 48%)
CMYK	cmyk(78%, 39%, 0%, 51.8%)
CIE-LAB	lab(31.10, 1.89, -31.88)
CIE-LCH	lch(31.10, 31.93, 273.39°)
OKLab	oklab(40.6% -0.0305 -0.0908)
OKLCH	oklch(40.6% 0.096 251.4)
XYZ	xyz(6.5419, 6.6945, 19.6824)
Luminance	0.0669 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B7B #7B4B1B

analogous

#1B7B7B #1B4B7B #1B1B7B

triadic

#1B4B7B #7B1B4B #4B7B1B

tetradic

#1B4B7B #7B1B7B #7B4B1B #1B7B1B

square

#1B4B7B #7B1B7B #7B4B1B #1B7B1B

split-complementary

#1B4B7B #7B1B1B #7B7B1B

monochromatic

#060F19 #102C49 #1B4B7B #266AAD #3C88D4

Accessibility & contrast

On white

8.98

#1B4B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1B4B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B7B

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B7B	#FFFFFF	#000000	##FFFFFF
##1B4B7B	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#354E7D

Deuteranopia (green-blind)

#26457A

Tritanopia (blue-blind)

#00565D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b4b7b;
/* rgb */ color: rgb(27, 75, 123);
/* oklch */ color: oklch(40.6% 0.096 251.4);

Tailwind

colors: {
  custom: {
    50: '#667ca1',
    500: '#1b4b7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b7b;
$custom-light: #667ca1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b7b",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 123
  },
  "hsl": {
    "h": 210,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.40601,
    "c": 0.09582,
    "h": 251.4
  },
  "luminance": 0.06695
}

Semantic roles & 50–950 ramp

primary

#1B4B7B

secondary

#AF7943

accent

#9441E7

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#07090F

muted

#7A7B7E

Preview Lab

Preview with #1B4B7B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →